2354603- The installer is already running on the directory specified on Solaris. BI 4.x

Symptom

Error: 'The installer is already running on the directory specified' appears even though no other SAP Business Objects Business Intelligence Platform installs are running

Following messages appear near the end of the setupengine.log

Error: Detected another engine running using the same root folder. Aborting... ........<cut lines>........Error: An install is already running at this location.PerlUISession::ShowMessage() called.Exiting Unix main function